Engineers, Surveyors & Architects

Engineers, surveyors and architects (those employed by private firms and those employed by federal, state and local agencies) are actively involved in the development of the new and updated flood hazard information presented on National Flood Insurance Program (NFIP) flood hazard maps and related products. This page outlines products, services and publications available to engineers, surveyors and architects.

Online Letter of Map Change (LOMC)

Online Letters of Map Change (LOMC) is an internet-based tool that allows applicants to easily request any type of LOMC. It is a convenient way for applicants to upload all information and supporting documentation and check the status of their application online. Users can submit flood map Amendment or Revision requests and pay any associated fees through this tool instead of filing the MT-EZ, MT-1 or MT-2 paper forms submitted through the mail.

Community Preliminary Flood Hazard Data

FEMA has launched a new way to view your community’s preliminary flood hazard data: over the web and in one convenient location! Preliminary flood hazard data provide an early look at your home or community’s risk to flood hazards. There are many benefits to viewing your community’s data before it becomes effective. For more information, visit the Preliminary Flood Hazard Data webpage.

FEMA Engineering Library

To obtain archival, technical and administrative support data, please visit the Engineering Library.

LOMC Clearinghouse

FEMA’s LOMC Clearinghouse centralizes the administrative functions associated with processing MT-EZ, MT-1 and MT-2 requests. Specific activities include creation of LOMC case files, upload and scanning of data, processing of associated fees and distribution to the appropriate location for processing.

When submitting paper applications, requestors should mail their applications and supporting data to:

Products, Services and Publications

Need to Produce a New Map?

A suite of engineering and mapping tools including forms for producing flood maps is available when you register to use the FEMA Mapping Information Platform under the Tools & Links page. These tools will assist in meeting the current FEMA guidelines and specifications for flood maps.

Changing a Map?

Submit a request through Online LOMC. View and download the required FEMA FEMA forms including application form packages for conditional and final Letters of Map Amendment, Letters of Map Revision Based on Fill and Letters of Map Revision.

Checking Status?

If you have submitted a request through Online LOMC, you can check status at any time by logging in and viewing your account. You can also view recent priority map changes and check the Status of Map Change Requests.

What's New in Flood Hazard Mapping?

Frequently Asked Questions

For More Information

For flood insurance related questions, contact FloodSmart at 1-888-379-9531. For flood mapping-related questions, please contact a Map Specialist at the FEMA Map Information eXchange through the following methods: